Piezoelectric monodisperse continuous liquid drop generator

Abstract

The invention belongs to the field of fluid mechanics, and particularly discloses a piezoelectric monodisperse continuous liquid drop generator. The piezoelectric monodisperse continuous liquid drop generator comprises a liquid storage tank, a spray head, piezoelectric ceramic, an electrifying ring and a deflection electric field, wherein the liquid storage tank is used for supplying liquid to the spray head; the piezoelectric ceramic is arranged above the spray head and is used for disturbing liquid in the spray head, so that the spray head generates uniform monodisperse liquid drops; the electrifying ring is arranged below the spray head and is used for electrifying part of liquid drops flowing out of the spray head; and the deflection electric field is arranged below the electrifying ring and is used for deflecting the charged liquid drops. According to the piezoelectric monodisperse continuous liquid drop generator, external disturbance is applied to liquid through the piezoelectric ceramic, so that liquid jet is regularly split to form uniform monodisperse liquid drop flow, meanwhile, the electrifying ring and the deflection electric field are arranged in a matched manner so that the liquid drops can be partially electrified and deflected, the number density of the liquid drops in a liquid drop string is reduced, and the distance between the liquid drops is adjusted.

Description

technical field [0001] The invention belongs to the field of fluid mechanics, and more specifically relates to a piezoelectric monodisperse continuous droplet generator. Background technique [0002] Microfluidic technology has great advantages in the preparation of droplets, such as strong controllability and uniform droplet size, so it has become an important method for preparing droplets. The preparation of droplets by microfluidic technology mainly depends on the droplet generator. Monodisperse droplets have a wide range of applications in the food, pharmaceutical, cosmetic, and other chemical industries. [0003] The working principle of the monodisperse droplet generator is based on the Plateau-Rayleigh instability. After the liquid jet is sprayed out of the small hole, it will break into droplets due to the Plateau-Rayleigh instability, but such a droplet flow is not uniform. It is also difficult to adjust the droplet spacing, so a droplet generator that can form a s...

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Problems solved by technology

[0003] The working principle of the monodisperse droplet generator is based on the Plateau-Rayleigh instability. After the liquid jet is sprayed out of the small hole, it will break into droplets due to the Plateau-Rayleigh instability, but such a droplet flow is uneven. It is also difficult to adjust the droplet spacing, so there is an urgent need for a droplet generator that can form a stable, uniform and monodisperse droplet flow

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